we appear to be the first to write up the outrage coherently too. much thanks to the illustrious @self
Self hosted email is its own can of worms. I wouldn’t recommend it to anyone outside of experienced IT people. You’ll end up blacklisted before you send your first email if you do anything wrong (and there’s a lot that can go wrong), and it doesn’t solve any security problems email has.
Anything sent over email just isn’t private. That goes for Proton customers when they send or receive anything from a non-Proton address too. The one thing privacy email providers can actually do is keep your inbox from being scanned by LLMs and advertisers. That doesn’t prevent the inboxes and outboxes of your contacts from being scanned, though.
If you use email, the best thing you can do is be mindful of what kinds of information you send through it. Use aliases via services like simple login or anonaddy when possible. Having a leaked email is a security vulnerability. Once bad actors have your email, they now have half of what they need to breach multiple accounts.
have been that sysadmin setting up a company email server. postfix is trivial to set up, absolutely the easiest experience. following that, though, was weeks of supplicant emails to MS to beg them please not to block us. My recommendation was never do this again, use a third-party outgoing email vendor, email is lost.
MS will send your mail straight to spam if you do not set up your domain keys and DMARC in DNS correctly and do not have a reject or quarantine RUA or the email(s) in your RUA bounce.
Sometimes you may get temporarily sent to spam if your IP is in a /28 of a known spammer IP.
That’s about it.
plus the bit where you wait six weeks for a response to your request that they unblock you
none of this process is fucking simple